Sasha Dichter is director of business development at Acumen Fund, a nonprofit VC for enterprises serving the poor. He is the author of the "Manifesto for Nonprofit CEOs" and a blogger on philanthropy and social change.
The founder of the MIT Media Lab, Nicholas Negroponte pushed the edge of the information revolution as an inventor, thinker and angel investor. He's the driving force behind One Laptop per Child, building computers for children in the developing world.
Economist George Ayittey sees Africa's future as a fight between Hippos -- complacent, greedy bureaucrats wallowing in the muck -- and Cheetahs, the fast-moving, entrepreneurial leaders and citizens who will rebuild Africa.
David Kelley’s company IDEO helped create many icons of the digital generation -- but what matters even more to him is unlocking the creative potential of people and organizations to innovate routinely.
Through his William J. Clinton Foundation, former US President Bill Clinton has become a vital and innovative force for world change. He works in four critical areas: health, economic empowerment, citizen service, and reconciliation.
Journalist Andrew Mwenda has spent his career fighting for free speech and economic empowerment throughout Africa. He argues that aid makes objects of the poor -- they become passive recipients of charity rather than active participants in their own economic betterment.
After a long career in journalism and publishing, Chris Anderson became the curator of the TED Conference in 2002 and has developed it as a platform for identifying and disseminating ideas worth spreading.
Pastor Rick Warren is the author of The Purpose-Driven Life, which has sold more than 30 million copies worldwide. His has become an immensely influential voice seeking to apply the values of his faith to issues such as global poverty, HIV/AIDS and injustice.
Jacqueline Novogratz works to enable human flourishing. Her organization, Acumen, invests in people, companies and ideas that see capital and networks as means, not ends, to solving the toughest issues of poverty.